1Helium
When helium is cooled to almost absolute zero, the lowest temperature possible, it becomes a liquid with surprising properties. It can flow against gravity and will start running up and over the lip of a glass container.
2Pure oxygen
Breathing 100% pure oxygen for more than 16 hours can lead to irreversible lung damage, damage to the retinas, and eventually, death.
3Radon bath
Radon (a radioactive gas that can cause lung cancer) baths exist in the town of Khmilnyk, Ukraine. They advertise to treat a host of medical conditions and around 50,000 people a year use them.
4Carbon dioxide
Too much carbon dioxide in a crowded room can make you dumber.
5Carbon Monoxide
Carbon Monoxide is used in the USA to make meat appear fresher. This practice is banned in Canada, Japan, Singapore, and the European Union.
6Nitrogen chips
The air used in bags of chips is actually Nitrogen, which keeps the chips from going stale.
7Chlorine gas
In 2014, Chlorine gas was released in a Hyatt Regency hotel, Illinois hosting a FurFest convention, injuring 19 people. The apparent chemical attack is unsolved, and the source of the chlorine is still unknown.
Latest FactRepublic Video:
15 Most Controversial & Costly Blunders in History
8Radon gas
When Radon gas in American homes was discovered, nuclear plant employees were tested for radiation and one of them was more radioactive when he came to work in the morning than when he left in the evening.
9Mustard gas
Mustard gas led to chemotherapy. During a World War 2 air raid, German pilots hit an American ship which had a secret stockpile of mustard gas. Doctors noticed that the gas suppressed cell division, which could fight cancer.
10Nitrous oxide
Nitrous oxide, commonly known as laughing gas, was first used as a recreational party drug by Britain's wealthy class in the 1700s before it was ever utilized for medical reasons.
